如何创建Ansible剧本以获取远程主机的OS版本? [英] how to create Ansible playbook to obtain OS versions of the remote hosts?

问题描述

我是新来的ansible.我有一项要求，要求我为AWS托管的450多个Linux服务器安装OS版本. AWS不提供此功能-而是建议我们从木偶或厨师那里获取它.

I'm new to ansible. I have a requirement that requires me to pull OS version for of more than 450 linux severs hosted in AWS. AWS does not provide this feature - it rather suggests us to get it from puppet or chef.

我创建了一些无法运行的简单剧本

I created few simple playbooks which does not run

---
- hosts: testmachine
user: ec2-user
sudo: yes
tasks:
- name: Update all packages to latest
yum: name=* state=latest

task:
- name: obtain OS version
shell: Redhat-release

playbook应该输出带有主机名和操作系统版本的文本文件.任何对此的见解将受到高度赞赏.

playbook should output a text file with hostname and OS version. Any insight on this will be highly appreciated.

推荐答案

使用以下Jinja2表达式之一:

Use one of the following Jinja2 expressions:

{{ hostvars[inventory_hostname].ansible_distribution }}
{{ hostvars[inventory_hostname].ansible_distribution_major_version }}
{{ hostvars[inventory_hostname].ansible_distribution_version }}

其中:

• hostvars和ansible_...内置并由Ansible自动收集
• ansible_distribution是Ansible正在处理的主机

• hostvars and ansible_... are built-in and automatically collected by Ansible
• ansible_distribution is the host being processed by Ansible

例如，假设您正在对运行CentOS 7发行版的主机host.example.com运行Ansible角色test_role:

For example, assuming you are running the Ansible role test_role against the host host.example.com running a CentOS 7 distribution:

---
- debug:
    msg: "{{ hostvars[inventory_hostname].ansible_distribution }}"
- debug:
    msg: "{{ hostvars[inventory_hostname].ansible_distribution_major_version }}"
- debug:
    msg: "{{ hostvars[inventory_hostname].ansible_distribution_version }}"

会给您:

TASK [test_role : debug] *******************************************************
ok: [host.example.com] => {
    "msg": "CentOS"
}

TASK [test_role : debug] *******************************************************
ok: [host.example.com] => {
    "msg": "7"
}

TASK [test_role : debug] *******************************************************
ok: [host.example.com] => {
    "msg": "7.5.1804"
}

这篇关于如何创建Ansible剧本以获取远程主机的OS版本?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！